单项选择题

单项选择题 Not until I began to work （）how difficult it was.

A.I knew
B.I did know
C.did I know

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单项选择题

Now I have a room （）my own. It's next to Mary's.

A.of
B.for
C.on

单项选择题

All the information can （）in this small computer.

A.store
B.be storing
C.be stored

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